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amrameshreddy.blog.comxviii ■FOREWORDramrameshreddy.blog.comSupport for the WS-* protocols means that web services can easily take advantage of interoperablesecurity, reliability, and transaction support required by businesses today. Developerscan now focus on business logic and leave the underlying plumbing to WCF. WCF also providesopportunities for new messaging scenarios with support for additional transports suchas TCP and Named Pipes and new channels such as the peer channel. More flexibility is alsoavailable around hosting web services. Windows Forms applications, ASP.NET applications,console applications, Windows services, and COM+ services can all easily host web serviceendpoints on any protocol. WCF also has many options for digitally signing and encryptingmessages including support for Kerberos and X.509.Building distributed systems using SOA is not a new concept. However, WCF represents anew paradigm in how these applications are developed using the .NET Framework 3.0. Eachauthor has practical real-world experience in building and architecting distributed systems fora variety of customers. They also bring a wealth of knowledge and experience in their understandingof WCF and the .NET Framework. In this book they come together to presentpractical answers in building a good architecture, the options you have for communication,the various security concerns, and so much more.This book doesn’t merely offer genuine insight into solving real enterprise problems usingWCF. It also provides extensive examples to make it easier to put these into practice. This bookis definitely a great resource for application developers and architects new to SOA or just newto the core concepts of WCF. It is great to see a resource that both answers common questionsand provides guidance that gets right to the point from experienced architects and developers.I hope you enjoy reading this book as much as I did and keep it close as you start buildingyour own WCF applications.Thom RobbinsDirector, .NET Platform MarketingMicrosoft Corporationramrameshreddyramrameshreddy